Attachment for cutting and flanging machines



Se t. 16, 1930. o. R. OLSON 1,775,864

ATTACHMENT FOR CUTTING AND FLANGING MACHINES I Filed April 29, 1929 3 Sheets-Sheet 1 anveutoz; OZof 7a. 026077,,

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Sept. 16, 1930. o. R. OLSON ATTACHMENT FOR CUTTING AND F'LANGING MACHINES Filed April 29, 1929 3 Sheets-Sheet 2 Wfz'iiine SS 1. fizz Sept. 16, 1930. o. R. OLSON ATTACHMENT FOR CUTTING AND FLANGING MACHINES Fil'ed April 29, 1929 ,3 Sheets-Sheet 3 awucmfoz 020] R. 0250 2,

Patented Sept. 16, 1930 PATENT OFFICE OLOF R. OLSON, OF KANSAS CITY, MISSOURI ATTACHMENT FOR CUTTING AND FLANGING MACHINES Application filed April 29,

My invention relates to an attachment for cutting and fianging machines and my object is to provide. a new and useful attachment of this character which may be employed to advantage in the production of elliptical or other irregular shaped sheet metal plates such as are used as heads on sheet metal drums and other containers of elliptical or other irregular cross sectional configuration.

In carrying out by invention I employ means for supporting a sheet metal blank, and mechanism for guiding said supporting means in such relation to the cutting and fianging mechanism that said blank will be s accurately cut in the desired shape and have a marginal flange formed thereon.

In the accompanying drawings which illustrate one form of the invention:

Fig. 1 is a fragmentary side elevation of a 20 cutting and flanging machine provided with my attachment.

Fig. 2 is a plan view of the attachment removed from the cutting and flanging machine.

Fig. 3 is an enlarged plan view of a guide and a support therefor forming parts of my attachment.

- Fig. 1 is a broken sectional view on line 4-4: of Fig. 3 with the addition of a rotary table 30 which is operably mounted upon the guide.

Referring in detail to the various parts disclosed by the drawings, 2 designates a portion of the cutting and flanging machine which is provided with rotary cutters, not shown, and a flanging roller 4, which latter is fixedly mounted upon a driven shaft 6. The shaft 6 is pivotally mounted at its driven end, not shown, so that it may be swung up or down to position the roller 4 upon the sheet metal blank A for the purpose of forming 9. marginal flange thereon after'said blank has been cut into proper shape by the cutting rolls. As the cutting and fianging machine may be of any well-known type, a detail description thereof is deemed unnecessary.

Referring now more particularly to the 1 parts constituting the present invention, 8

designates a bed which is bolted or otherwise firml secured to the front side of the cutting and fi anging machine 2.

1929. Serial No. 359,000.

10 designates movable supporting means provided at its under side with slides 12 and 14 which operate upon a way 16 at the upper portion ofthe bed 8.. The slide 12 is provided with a depending nut 18 which is 55 threaded upon a horizontally disposed screw 20 journaled in suitable bearings 22 formed in the bed 8. The screw 20 may be rotated to move the slides 12 and 14 and the parts carried thereby into or away from the cutting and fianging machine by means of gears 2% and 26 and a hand wheel 28.

The supporting means 10 consists preferably of a channel bar bent midway between its ends into U-form as shown more clearly by Figs. 1 and 3, around the lower end of the post 30 of a swingable crane carried by said supporting means 10. The post 30 is provided at its upper and lower portions with antifriction bearings 32 upon which a tubular shaft 3et'is j ournaled. The top of the hollow post 30 is closed with a cap 46.

The tubular shaft 34 is provided with a horizontally disposed arm 38 which may be swung in a circle and is preferably of hollow 75 rectangular shape in cross section and provided with guide rollers 40 between which a carriage 42is arranged to travel back and forth in said arm 38. The carriage 4:2 con.-. sists of a body 44 and rollers 46 upon which latter said body 44.- is mounted. The forward end of the body 14 is internally threaded for the reception of a vertically disposed screw 18 extending throughslots- 50 in the upper and lower sides of the arm 38.

The screw 48 is provided at its upper end with a hand wheel 52 and has an antifrictional universal connection 54: at its lower end with a rotary'clamp 56. The clamp is adapted to firmly hold the sheet metal blank A upon a rotatable table 58, which is mounted upon antifriction bearings carried by a guide member 62 firmly secured by suitable means such as screws 64 to the upper portion of the adjustable supporting memher 10. The rotatable table 58 is equipped with a peripheral rim 64; which is of elliptical or the same contour as the finished sheet metal head is to be. The rim tit is removably. secured to the table 58 by suitable 58. In the present instance the grooves 78 and 86 form an approximate ellipse as do likewise the grooves 82 and 84:, while the groove 80 and 88 parallel the grooves 78 and 86, respectively. 96 designates a thrust roller engaging the under side of the rotatable table 58 and the inner surface of a depending rail 98 extending around the margin of said table 58. As shown by Fig. 1 the thrust roller 96 is arranged near the flanging roller 4 for the purpose of preventing'the table 58 from being forced backwardly by said fianging roller 4 and thus causing undue pressure upon the stub shafts 94 and the rollers carried there-- by. The thrust roller 96 is mounted upon a stub shaft 100 carried by a bracket 102 bolted or otherwise firmly'se cured to the forward ends of the supporting means 10.

In practice a sheet metal blank, such as A, to be cut and flanged is firmly secured upon the table 58 by means of the clamp 56 which is forced downwardly upon said blank by means of the screw 48. The machine 2 is equipped with the cutting rolls, not shown, after which the supporting means 10 and parts carried. thereby are adjusted towards the machine 2 by turning the hand wheel 28 in order to bring the blank sheet A into proper position to be trimmed. The rotary cutters are then set in motion for the purpose of rotating and cutting the sheet A, the shape of which latter is controlled by the grooves in the guide member 62 and the rollers 68, 70, 72, 74 and 76.

It is immaterial Whether the cutting rollers when operating on the blank A drive the table 58 in a clockwise or anticlockwise direc tion, but assuming that the table is driven in a clockwise direction, the operation is as follows: When the roller 72 reaches the center of the groove 86 as shown by Fig. 3, it is held stationary by the rollers 68, 70, 74 and 76 as they travel to the right in the respective grooves 78, 90, 80 and 92, as indicated by the arrows. When the roller 72 is held stationary as stated, it becomes the center of a short are described by the front end of the table 58and on which one end of the blank A is cut to form one end of the oval head as shown at the left end of Fig. 2. The roller 72 remains stationary while the roller 68travels from the left to the right end of the groove 78,

wease at which time the roller 7 0 reaches the center of the groove 80 where it is held stationary by the other rollers and forms the center of a long are on which one of the long sides of the blank A is cut as shown by dotted lines at the left end of Fig. 2. The roller remains stationary until the roller '68 reaches the roller 74: is held stationary by the other rollers and constitutes the center of a long are equal to the first-mentioned long arc and on which the opposite long side of the blank is cut to complete the cutting of saidblank. After the blank A has been cut into oval shape the rotary cutters are either removed or swung out of the way while the fianging roller 4 is brought into position and gradually moved downwardly to the dotted line position, Fig. 1, to form the flange of the head as the table 58 is turned another revolution in the same manner as when the blank A was being cut intooval shape. During the cutting and hanging operations the arm 38 of the crane swings laterally and the carriage 42 moves to and fro as the table 58 gyrates, while the roller 76, which is positioned in axial alinement with the screw 4-8, traverses the grooves 82 and 84 and cooperates with ried according to the shape and size of thesheet metal head desired. Ialso reserve the.

right to make such other changes and modifications as properly fall within the spirit and scope of the invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent, is:

1. An attachment for sheet metal blank cutting and flanging machines consisting of a rotatable table for supporting and guiding sheet metal blanks while being cut and flanged, a guide member upon which said table is operably mounted,sa-id guide member having grooves for determining the shape in which the blanks are to be cut, rollers .on the table and arranged to travel in said grooves and cooperate therewith in determining the shape in which the blanks are to be cut, and means for securing, the blanks upon said table.

2. An attachment for sheet metal blank cutting and flanging machines consisting of a rotatable table for supporting and guiding sheet metal blanks while being cutand flanged, a guide member having ball bearings upon which said table 1s operably mounted, said guide member also havlng approximately elliptical shaped grooves and other grooves paralleling the aforementioned grooves and cooperating therewith in determining the shape in which the blanks are to be cut, means depending from the table into said grooves for cooperating therewith in determining the shape of the blanks, means for securing the blanks upon said table, and swingable means for carrying said securing means.

'3. An attachment for sheet metal blank cutting and fianging machines consisting of a rotatable table for supporting and guiding sheet metal blanks while being cut and flanged, guide means for said table for determining the shape in which said blanks are to be cut, clamp means for securing the blanks upon said table, a thrust roller for preventing the table from being forced back- Wardly by the cutting and flanging mechanism, and a swingable crane carrying said blank securing means.

.4. An attachment for sheet metal blank cutting and fianging machines consisting of a bed, supporting means slidably mounted upon said bed so that said supporting means may be adusted towards or away from the cuttin and flanging mechanism, a rotatable table or supporting and guiding sheet metal blanks while bein out and flanged, guide means for said ta le mounted on the supporting means for determining the shape in which the blanks are to be cut, clam means for securing the blanks upon said tab e, screw means for adjusting said clamp means in and out of engagement with the blanks, a carriage in WlllCll said screw means is adjustably mounted, an arm'in which said carriage is adapted to travel, a tubular shaft carrying said arm, and a post fixed to the supporting means and upon which said tubular shaft is journaled,

5. An attachment for sheet metal blank cutting and flanging machines consisting of a bed, supporting means slidably mounted upon said bed so that said supporting means may be adjusted towards or away from the cutting and Hanging mechanism, mechanism for sliding said sup orting means upon the bed, a rotatable table for sup orting and v guiding sheet metal blanks whl e being cut and flanged, guide means for said table mounted on the su porting means for determining the shape in which the blanks are to be out, clamp means for securing the blanks upon said. table, screw means for adjusting said clamp means in and out of engagement with the blanks, a carriage in which said screw means is adjustably mounted, an arm 6. A machine of the character described consisting of a rotatable table for supporting and guiding blank sheets while being cut,

guide means for said table for determining the shape in which said blanks are to be cut, means or securing the blanks upon said table, a reciprocatory carriage supporting said blank securing means, a swingable arm supporting said carriage upon the table, a tubular shaft upon which said arm is fixed, and a vertically disposed post upon which said shaft is journaled.

7. In a machine of the character described, rotary means for supporting and guiding blank sheets while being cut, supporting means for said rotary means, approximately elliptical-shaped grooves and other grooves in one of said supporting means, and means on the other supporting means for traveling in said grooves and cooperating with the latter in guiding the blank supporting means.

In testimony whereof I alfix my signature.

OLOF R. OLSON. 

